You are looking at an old revision of the page MemoryMap. This revision was created by Paul Boddie.
The memory map of the SoC (particularly the peripheral memory)
Memory Map
The JZ4730 has a memory map with the following principal regions of interest:
| Start Address | End Address | Size | Function |
|---|---|---|---|
| 0x00000000 | 0x07FFFFFF | 128MB | SDRAM |
| 0x10000000 | 0x10FFFFFF | 16MB | APB I/O devices |
| 0x13000000 | 0x13FFFFFF | 16MB | AHB I/O devices |
| 0x1FC00000 | 0x1FC00FFF | 4KB | Boot ROM |
| 0x20000000 | 0xDFFFFFFF | 3GB | SDRAM |
Note that the above regions are not adjacent: reserved and other regions are present that are not directly relevant to the Letux 400.
(The 3GB region from 0x20000000 is actually pertinent on the MIPS Creator CI20 which provides 1GB RAM, but where the region from 0x00000000 has only been upgraded to provide access to 256MB RAM.)
(The boot ROM region is where the CPU will jump to in order to run its built-in boot routines on start-up.)
The I/O or peripheral memory is described below.
I/O Memory
The JZ4730 offers the following regions for configuration of and interaction with peripherals:
| Start Address | Size | Function |
|---|---|---|
| 0x10000000 | 0x4C | CPM (clock and power management, see Clocks) |
| 0x10001000 | 0x14 | INTC (interrupt controller) |
| 0x10002000 | 0x80 | OST (operating system timer, see Clocks) |
| 0x10003000 | 0x10 | RTC (real-time clock) |
| 0x10004000 | 0x08 | WDT (watchdog timer, see Clocks) |
| 0x10010000 | 0xC0 | GPIO (general purpose input/output) |
| 0x10020000 | 0x38 | AIC (AC97/I2S controller, audio) |
| 0x10021000 | 0x40 | MSC (MMC/SD controller, memory card) |
| 0x10030000 | 0x24 | UART0 (UART #0) |
| 0x10031000 | 0x24 | UART1 (UART #1) |
| 0x10032000 | 0x24 | UART2 (UART #2) |
| 0x10033000 | 0x24 | UART3 (UART #3) |
| 0x10040000 | 0x1C | FIR (infrared communication) |
| 0x10041000 | 0x20 | SCC0 (smartcard) |
| 0x10042000 | 0x10 | I2C (inter-integrated circuit bus) |
| 0x10043000 | 0x1C | SSI (synchronous serial interface, SPI) |
| 0x10044000 | 0x20 | SCC1 (smartcard) |
| 0x10050000 | 0x0C | PWM0 (pulse width modulation, PWM) |
| 0x10051000 | 0x0C | PWM1 (pulse width modulation, PWM) |
| 0x10060000 | 0x38 | DES (data encryption standard) |
| 0x10061000 | ? | UPRT |
| 0x10062000 | ? | KBC |
| 0x13000000 | 0x28 | HARB (bus arbitration) |
| 0x13010000 | 0x100 | EMC (NAND controller) |
| 0x13020000 | 0x100 | DMAC (DMA controller) |
| 0x13030000 | ? | UHC (USB host controller) |
| 0x13040000 | 0x844 | UDC (USB device controller) |
| 0x13050000 | 0x60 | LCD (LCD controller) |
| 0x13060000 | 0x30 | CIM (camera interface module) |
| 0x13100000 | 0x1058 | ETH (Ethernet) |
| 0x13F00000 | ? | NBM |
The EMC peripheral also uses these regions:
0x1301a000, 0x1301b000, 0x1301c000, 0x1301d000